What is chain link method?

The chain link method is a statistical technique used for linking different series of data, often in the context of economic indices or price series. It involves adjusting the values of one series to connect with another series at specific points, typically using a weighted average or ratio. This method allows for the creation of a continuous time series that reflects changes over time, making it easier to analyze trends and perform comparisons. It's commonly utilized in national accounts and economic analysis to maintain consistency across varying data sources.